yes -- but the (positive) value is to only certain parties.

you're not missing anything.

both bombs and blockchain tech are destructive for most people -- not positive/additive.

but bombs and blockchain tech can also make megafortunes for the people that own, control, and use them.

there are some edge cases where bombs and blockchain tech could theoretically be more useful than the alternatives, but a sane/decent world would save those experiments for the philosophy lecture room.